The exact definition of this range varies. An old source[1] uses Kunlun to mean the mountain belt that runs across the center of China, that is, Kunlun in the narrow sense: Altyn Tagh along with the Qilian and Qin Mountains. A recent source [2] has the Kunlun range forming most of the south side of the Tarim Basin and then continuing east south of the Altyn Tagh. Sima Qian (Shiji, scroll 123) says that Emperor Wu of Han sent men to find the source of the Yellow River and gave the name Kunlun to the mountains at its source. The name seems to have originated as a semi-mythical location in the classical Chinese text Shanhai Jing.

The highest mountain of the Kunlun Shan is the Kunlun Goddess (7,167 m) in the Keriya area. The Arka Tagh (Arch Mountain) is in the center of the Kunlun Shan; its highest point is Ulugh Muztagh (6,973 m). Some authorities claim that the Kunlun extends northwest-wards as far as Kongur Tagh (7,649 m) and the famous Muztagh Ata (7,546 m). But these mountains are physically much more closely linked to the Pamir group (ancient Mount Imeon).

The range has very few roads and in its 3,000 km length is crossed by only two. In the west, Highway 219 traverses the range en route from Yecheng, Xinjiang to Lhatse, Tibet. Further east, Highway 109 crosses between Lhasa and Golmud.

Over 70 volcanic cones form the Kunlun Volcanic Group. They are not volcanic mountains, but cones. As such, they are not counted among the world volcanic mountain peaks. The group, however, musters the heights of 5,808 metres (19,055 ft) above sea level (35°30′N80°12′E﻿ / ﻿35.5°N 80.2°E﻿ / 35.5; 80.2). If they were considered volcanic mountains, they would constitute the highest volcano in Asia and China and second highest in the Eastern Hemisphere (after Mount Kilimanjaro) and one of Volcanic Seven Summits by elevation. (Mount Damavand is the highest volcano in Asia, not the Kunlun cones.) The last known eruption in the volcanic group was on May 27, 1951.[4]

Kunlun is originally the name of a mythical mountain believed to be a paradise of Taoism. The first to visit this paradise was, according to the legends, King Mu (976-922 BCE) of the Zhou Dynasty. He supposedly discovered there the Jade Palace of Yellow Emperor, the mythical originator of Chinese culture, and met Hsi Wang Mu (Xi Wang Mu), the 'Spirit Mother of the West' usually called the 'Queen Mother of the West', who was the object of an ancient religious cult which reached its peak in the Han Dynasty, also had her mythical abode in these mountains.

The Kunlun mountains are associated with a number of different martial arts, and are considered by some as an alternate source for the Daoist martial arts (Wudang being traditionally claimed as the source.) Some styles associated with the Kunlun mountains:

Kunlun Mountain Fist is a style associated with the Kunlun mountain range, although similarities between this style and Kunlunquan, as well as the name of one of the forms (White Cloud Mountain Fist) suggest that this style may be associated with Kunlun Mountain in Shandong province

Kunlunquan may be named after the Kunlun mountain range, or it may be named after Kunlun Mountain in Shandong province.